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Fingerprint matching method, fingerprint matching device and fingerprint recognition chip

A matching method and matching device technology, applied in character and pattern recognition, instruments, calculations, etc., can solve problems such as high numerical values, misrecognition, etc.

Active Publication Date: 2021-07-30
BYD SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of the related technology is that the ridge score may also have a higher value when the ridges do not overlap, which may easily lead to misidentification.

Method used

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  • Fingerprint matching method, fingerprint matching device and fingerprint recognition chip
  • Fingerprint matching method, fingerprint matching device and fingerprint recognition chip
  • Fingerprint matching method, fingerprint matching device and fingerprint recognition chip

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Embodiment Construction

[0044] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0045] The following describes the fingerprint matching method, the fingerprint identification device and the fingerprint identification chip proposed by the embodiments of the present invention with reference to the accompanying drawings.

[0046] Figure 2a is a flowchart of a fingerprint matching method according to an embodiment of the present invention. Such as Figure 2a As shown, the fingerprint matching method includes the following steps:

[0047] S1: Process the fingerprint image to be matched and the template finger...

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Abstract

A fingerprint matching method disclosed in the present invention comprises the following steps: processing the fingerprint image to be matched and the template fingerprint image to find matching feature points between the fingerprint image to be matched and the template fingerprint image; obtaining the amount of rotation and translation according to the matched feature points , and adjust the position of the fingerprint image to be matched according to the amount of rotation and translation to obtain the overlapping area of ​​the two images; compare the ridges of the pixels in the overlapping area to obtain the ridge score; compare the direction field of the pixels in the overlapping area to obtain the direction field score; calculate the comparison score according to the ridge score and the direction field score, and judge whether the two fingerprint images match according to the comparison score, thus, through the combination of the ridge recognition and the direction field comparison, the reduction of The occurrence of wrong matching reduces the false recognition rate and improves the accuracy of fingerprint identification.

Description

technical field [0001] The invention relates to the technical field of fingerprint identification, in particular to a fingerprint matching method, a fingerprint matching device and a fingerprint identification chip. Background technique [0002] The fingerprint identification method in the related art uses a ridge line comparison method to perform fingerprint identification. However, the disadvantage of the related technology is that the ridge score may have a higher value when the ridges do not overlap, which may easily lead to misidentification. [0003] Therefore, related technologies need to be improved. Contents of the invention [0004] The inventors of the present invention have discovered and realized that: figure 1 As shown, when the ridges intersect vertically, the ridges have an overlap rate of nearly 50%, and when the fingerprints do not overlap at all, the overlap score is still nearly 50 points or higher, and may even exceed the threshold and cause misident...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00
Inventor 雷磊李振刚徐坤平杨云
Owner BYD SEMICON CO LTD
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